Abrading-tool.



W. A. REED.

ABRADING TOOL. AYPLIOATION FILED 001229, 1910.

1,014,094, Patented Jan. 9, 1912.

WM/[SSEST ATEN FFIQ.

WILLIAM A. REED, OF CHELSEA, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MA-CHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ABRADING-TOOL.

1 014,()94 Specification of Letters Patent. Patented Jan, 9, 1912Application filed October 29, 1910. Serial No. 589,747.

To all whom 'it mayconcern:

Be it known that I, WILLIAM A. Reno, a citizen of the United States,residing at Chelsea, in the county of Suffolk and State ofMassachusetts, have invented certain Improvements in Abrading-Tools, ofwhich the been customary to hold the cover of abrasive material such assandpaper in place by. means of hooksor similar clamping members whichare drawn toward the center of the roll in order to force the abrasivecover against the layer of felt with which the roll is provided. In thecourse of use these hooks are often broken so that it becomes necessaryto replace them. Hitherto such replacement has been diiiicult ofaccomplishment and has in some cases necessitated the dismantling of theroll.

Accordingly one feature of the present invention consists in theprovision with an abrading tool adapted to support an abrasive cover,and a hook for holding said cover in place of an actuator for tighteningand releasing said hook, and locking means for connecting said hook withsaid actuator and for disconnecting it therefrom. In the illustratedembodiment the actuator takes the form of a bar which may be movedtoward and from the center of the roll; and a plurality of hooks aredetachably connected with this bar by means of a locking member whichmay be moved in one direction to connect the hooks with the bar and inanother direction to disconnect them therefrom. And preferably theconstruction is such that the hooks may be simultaneously connected withand disconnected from the actuating bar by a slight movement of thelocking member. \Vith this construction any one of the hooks may readilybe replaced without disturbing those which remain.

The construction in the illustrated embodiment is such that relativemovement be tween the roll and its driving shaft serves, by means of camslots which engage the ends of the actuating bar, to draw said bartoward the center of the roll. There is thus a tendency for the bar tospring and thereby permit the tension on the central hooks to berelieved.

Accordingly another feature of this invention consists in the provisionof a cam to engage the bar intermediate its ends and thereby hold thecentral hooks firmly down upon the abrasive cover.

Another feature of the invention consists in a construction andarrangement of parts in a buffing roll of the present type whereby saidroll is self-contained and may therefore be adjusted with respect to itsdriving shaft. In the illustrated embodiment the actuating bar iscarried by the roll itself and the collars which hold the roll in placeare adjustable with respect to the driving shaft.

These and other features of the invention including certain details ofconstruction and combinations of parts will be described in connectionwith an illustrative device and will be pointed out in the claims.

Referring now to the accompanying drawing, Figure 1 is a perspective ofa buffing roll in which the present invention is embodied, the rollhaving been sectioned in several places to permit views of the interior;Fig. 2 is a perspective of one end of the actuating bar and the lockingrod, the base of one hook being shown connected with said bar by saidrod; Fig. 8 is an end view of the roll from the right as shown in Fig.1, the driving shaft being shown in section; Fig. 4 is a perspective ofthe left hand collar showing the cam groove and socket therein; Fig. 5is a perspective of the left hand end of the roll; Fig. 6 is a sectionon the line 66 of Fig. 3; and Fig. 7 is a perspective of a modified formof actuating bar and locking rod.

The roll is loosely mounted on its driving shaft 1 being held fromendwise movement by collars 3 and 5 which are adjustably fastened to theshaftby means of set screws 7 and 9. The roll comprises a cylinder 11 ofwood or other suitable material which is surrounded by a layer 13 offelt or other yielding material; and about the felt layer is wrapped asheet of sandpaper 15. The cylinder 11 is composed of two semi-circularsections held together by bearing members 17 which are provided withslots 19 and 20 for a purpose presently to be described. These bearingsare also provided with slots to permit the passage therethrough of theends of the actuating bar 21. The ends themselves are received in camgrooves 23 and 24 in the collars 3 and 5. As will be evident, these camgrooves are, so shaped that angular movement of the roll with respect tothe shaft in one direction will cause the actuating bar 21 to be movedtoward the center of the roll, while movement in the opposite directionwill cause said bar to be moved away from the center of the roll. Thehooks 25 are formed with flat holding portions and at their bases haveprovision for receiving a locking member. The hooks shown are formedfrom stock rectangular in cross section by flattening one end andbending it approximately at right angles and then bending the oppositeend to form a crook, but hooks having other forms and made in other waysmay very evidently be used, if desired. The actuating bar 21 is formedwith a plurality of pairs of ears 27 each pair forming a socket toreceive the base of a hook. The upper portion of the actuating baradjacent each socket is cut away as shown at 29 to receive a short key31 which forms part of the locking device 33, said device, as clearlyshown in Fig. 2, comprising a rod which is adapted to slide in a groove35 in said bar. With this construction it will be evident that when thehooks are locked to the bar and the roll is turned in the properdirection with respect to the driving shaft 1, the hooks 25 will bedrawn down toward the center of the roll thereby engaging the abrasivecover and holding it securely in place. Since, however, the actuatingbar 21 might yield to some extent in its central. portion there isprovided a cam 37 to engage the bar intermediate its ends and pull ittoward the center of the roll. This cam is mounted upon a ring 39 whichfits loosely upon the shaft 1, and to this ring is attached an operatingbar 41 the ends of which pass through the slots 19 and 20 and arereceived in sockets 43 and 44 in the collars 3 and 5.

In order to lock the roll in its two extreme positions the bearing 17 atthe right hand, as seen in Fig. 1, is provided with two socketscontaining spring pressed plungers 47 and 48, and the collar 5 isprovided with a bore in which there is mounted a slidable push rod 49which is held as shown from being entirely removed, but is permitted acertain amount of longitudinal movement. As shown in Fig. 1 the hooksare drawn down tightly upon the abrasive cover. If now it is desired toloosen the hooks, the push rod is moved to depress the plunger 47whereupon the roll may be moved to loosen the hooks; and as soon as theroll reaches a position approximately ninety degrees from the one shown,the plunger 48 will enter the bore of the push rod 49 and again lock theroll. WVith the roll thus firmly held from angular movement with respectto the shaft a sheet of sandpaper which has been forced over the hooksmay be. drawn tightly about the roll. In order to permit movement of thelocking member without disturbing the collars 3 and 5, the collars areprovided with small bores, one of which is shown at 50, through which atool may be inserted; and these bores extend into the ends of the camgrooves 23 and 24 which are farthest from the center of the roll, thebores being so located that when the roll is locked in that position inwhich the hooks are loosened said bores are opposite the ends of thelooking member 33.

In Fig. 7 there is shown a modified construction of actuating bar 121 inwhich the sockets for the hooks are formed by pairs of eyes 127 throughwhich a straight looking device 133 passes; and when this constructionis made use of the locking device 133 is preferably made in two pieceseither one of which may be withdrawn according as the hook to bereplaced is nearer one end or the other of the roll.

In use the roll is rotated in the direction indicated by the'arrow inFig. 3 until the plunger 48 becomes operative and the roll is locked inposition with the hooks loosened. A sheet of sandpaper of the properwidth and length is forced over the hooks and wrapped around the rollwith its free end beneath the operative portions of said hooks.It'should be noted that during this operation the roll is firmly held bythe plunger 48 so that tension may be exerted upon the sandpaper. Afterthe sandpaper has been placed in position as described above the pushrod 49 is pressed to unlock the roll, and the roll is rotated in theopposite direction thereby drawing the actuating bar 21 and with it thehooks toward the center of the roll to the position shown whereupon theplunger 47 automatically locks the parts in this position with thesandpaper tightly held in place. It should be noted that the operatingbar 41 is held stationary during these movements and that the movementof the roll forces the actuating bar 21 into engagement with the cam 37thereby drawing the central portion of said bar toward the center of theroll. If now it becomes necessary to replace one or more of the hooks,the roll is unlocked by means of the push rod 49 and rotated in thedirection indicated by the arrow in Fig. 3 until the plunger 48 becomesoperative as has been described. The actuating bar 21 is now in theopposite end of the cam grooves from that shown, and the ends of thelocking device are opposite the bores which extend through the collars.A

tool is then used to push the rod 33 in the proper direction to unlockthe hooks from the bar. Any one of the hooks may now be removed bymerely pulling it out and a new one may be inserted in its place, afterwhich the locking bar 33 may be moved in the opposite direction. Whenthe actuating bar illustrated in Fig. 7 is made use of, it will benecessary to pull out the locking bar 133 until the desired hook isunlocked, while in the preferred form the hooks are locked and unlockedsimultaneously. In use two of these rolls are commonly mounted upon ashaft which is rotated so rapidly that it must be perfectly balanced. Itshould be noted that the present roll is self-contained and has noconnection with the shaft except through the set screws 7 and 9. It istherefore possible to adjust the roll as a whole to any desired positionwith respect to the driving shaft; and where two or more rolls are usedon one shaft the shaft can thus be balanced perfectly.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:--'

l. A tool for an abrading machine comprising a body portion providedwith a bore to receive a shaft and adapted to sup port an abrasivecover, a hook for holding .said cover in place, an actuator movable withrespect to said shaft for tightening and releasing said hook, and alocking member for connecting said hook with said actuator and fordisconnecting it therefrom.

2. A tool for an abrading machine comprising a body portion providedwith a bore to receive a shaft and adapted to support an abrasive cover,a hook for holding said cover in place, said hook having provision atthe base of its shank for receiving a locking member, an actuatormovable with respect to said shaft for tightening and loosening saidhook, said actuator being provided with a socket to receive said base,and a locking member connecting said base and actuator.

3. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, a member carried by said roll and movablewith respect to said shaft, and means for detachably connecting saidhooks with said member.

4. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuating member, means for moving saidmember toward and from the shaft and a movable locking member forconnecting said hooks with said actuating member and for disconnectingthem therefrom.

5. A roll for an abrading machine comprising abody portion provided witha bore to receive a shaft, a plurality of hooks for holding an abrasivecover on said roll, a member movable toward and from the periphery ofsaid roll and means movable in one direction for connecting said hookswith and in the opposite direction for disconnecting them from saidmember.

6. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuating bar having sockets to receivethe base of said hooks, a member movable with respect to said bar forconnecting them therewith and for disconnecting them therefrom, andmeans for moving said bar toward and from the periphery of said roll.

7. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuator for tightening and looseningsaid hooks, and means for simultaneously con necting said hooks withsaid actuator and for similarly disconnecting them therefrom.

8. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuator for tightening and looseningsaid hooks and a locking member provided with a plurality ofcomparatively short keys for connecting said hooks with said actuator.

9. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuating bar for tightening andloosening said hooks, said actuating bar being provided with a pluralityof pairs of projections each pair forming a socket to receive the baseof a hook, and a locking rod slidable with respect to said bar andprovided with a plurality of short keys one for each socket wherebymovement of said rod to an extent not greater than the length of a keyserves to unlock all the hooks from the bar.

10. A roll for an abrading machine comprising a body portion providedwith a bore to receive a shaft, a plurality of hooks for holding anabrasive cover on said roll, an actuating bar provided with pairs ofprojections each pair forming a socket to receive the base of a hook, alocking device comprising a rod movable with respect to said bar and aplurality of keys movable with said rod in one direction to lock saidhooks to said bar and in the opposite direc tion' to unlock said hookstherefrom, and means for moving said actuator toward. and away from theperiphery of said roll to tighten and loosen said hooks.

11. The combination of a shaft, two collars fast thereto, a bufling'roll loosely mounted thereon, said roll comprising a plurality ofretaining hooks, an actuating member connected therewith, said memberbeing connected at its ends with said collars whereby relative movementbetween said roll and collars in one direction tightens said hooks andin the opposite direction loosens them, and separate means alsoconnected with said collars for engaging said actuating memberintermediate its ends.

12. The combination with a shaft of two collars having cam slots andholding sockets formed therein and means for adjustably fastening saidcollars to said shaft, of a bufling roll having its ends abutting saidcollars, said roll comprising a body portion, a plurality of hooks forholding an abrasive cover on said body portion, an actuator having itsends located in said slots, a cam for engaging said actuatorintermediate its ends, said cam being provided with a bar having itsends located in said sockets, and means for detachably connecting saidhooks with said actuator.

13. The combination of a shaft, two collars fastened thereto, a buffingroll loosely mounted on said shaft and having its ends abutting saidcollars, a plurality of hooks for holding an abrasive cover on saidroll, means operated by angular movement between said roll and shaft formoving said hooks to operative and inoperative positions, and means forlocking said roll with respect to said shaft in the two relative angularpositions which correspond to the operative and inoperative positions ofthe hooks.

14. The combination with a shaft of a roll loosely mounted thereon, aplurality of hooks and an actuating member carried by said roll, twocollars one at each end of said roll, said collars having provision forengaging said actuating member, and means for adjustably fastening saidcollars to said shaft.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM A. REED.

Witnesses:

CHESTER E. Rooms, LAURA M. GOODRIDGE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent! Washington, D. G.

